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Rate and temperature dependent viscoelastic cohesive zone model for mode-idelamination of composites (2023)
Conference Proceeding
Ammasai Sengodan, G. (2023). Rate and temperature dependent viscoelastic cohesive zone model for mode-idelamination of composites.

Introduction Initiation and propagation of delamination at room temperature and constant loading rates are modelled accurately by using bi-linear or exponential cohesive zone models (CZM) [1]. These "standard" traction-separation based models do not... Read More about Rate and temperature dependent viscoelastic cohesive zone model for mode-idelamination of composites.

Deep learning-based predictions of process parameters for thick composites laminates manufacturing (2022)
Presentation / Conference
Ammasai Sengodan, G., Hoang Luong, M., & A Ponnusami, S. (2022, September). Deep learning-based predictions of process parameters for thick composites laminates manufacturing

In a composite manufacturing process, the tool geometry and thermal characteristics of the bagging materials dictate the heat transfer mechanism. The temperature distribution, resin chemical kinetics and residual thermal strains determine the cured p... Read More about Deep learning-based predictions of process parameters for thick composites laminates manufacturing.

Prediction of two-phase composite microstructure properties through deep learning of reduced dimensional structure-response data (2021)
Journal Article
Ammasai Sengodan, G. (2021). Prediction of two-phase composite microstructure properties through deep learning of reduced dimensional structure-response data. Composites Part B: Engineering, 225, https://doi.org/10.1016/j.compositesb.2021.109282

A novel method to predict the mechanical responses of arbitrary microstructures from the deep learning of microstructures and their stress-strain response is presented in this work. Two-phase microstructural images that consist of different grain siz... Read More about Prediction of two-phase composite microstructure properties through deep learning of reduced dimensional structure-response data.

Hygrothermal effects on the translaminar fracture toughness of a highly toughened aerospace CFRP: Experimental characterisation and model prediction (2021)
Journal Article
Sengodan, G. A., Li, S., Allegri, G., & Hallett, S. R. (2021). Hygrothermal effects on the translaminar fracture toughness of a highly toughened aerospace CFRP: Experimental characterisation and model prediction. Composites Part A: Applied Science and Manufacturing, 150, https://doi.org/10.5075/978-X-XXX-XXXXX-X

The translaminar fracture toughness of wet (fully saturated) and dry (as manufactured) IM7/8552 laminates was measured using compact tension tests. Cross-ply ([90/0]8S) and quasi-isotropic ([90/45/0/-45]4S) laminates were tested at three different te... Read More about Hygrothermal effects on the translaminar fracture toughness of a highly toughened aerospace CFRP: Experimental characterisation and model prediction.

Simulation of progressive failure in laminated composites under variable environmental conditions (2020)
Journal Article
Ammasai Sengodan, G., Allegri, G., & Hallett, S. (2020). Simulation of progressive failure in laminated composites under variable environmental conditions. Materials and Design, 196, https://doi.org/10.1016/j.matdes.2020.109082

This paper presents the development, calibration and finite element implementation of a novel set of phenomenological equations describing the effect of temperature and moisture on the stiffness, strength and toughness properties of fibre-reinforced... Read More about Simulation of progressive failure in laminated composites under variable environmental conditions.

Numerical modelling of the effects of temperature and moisture on mechanical response (2019)
Presentation / Conference
Ammasai Sengodan, G., Allegri, G., & Hallett, S. (2019, September). Numerical modelling of the effects of temperature and moisture on mechanical response. Presented at 7th ECCOMAS Thematic Conference on Mechanical Response of Composites, University of Girona, Girona, Spain

Hi-fidelity finite element models with physically based failure criteria are now well established for fiber reinforced composites, giving good accuracy at standard room temperature conditions. However, the mechanical properties of fiber reinforced co... Read More about Numerical modelling of the effects of temperature and moisture on mechanical response.

A parametric study on strength and stiffness of hybrid scarf joints (2017)
Presentation / Conference
Shankar, S., Ammasai Sengodan, G., & Idapalpati, S. (2017, August). A parametric study on strength and stiffness of hybrid scarf joints. Presented at ICCM International Conferences on Composite Materials, Xi'an, China

This work presents a parametric study of adhesively bonded scarf joints enriched with mechanical fasteners. Tensile tests of two different fastener positions along the load path were carried out and compared with bonded scarf joint. It was found that... Read More about A parametric study on strength and stiffness of hybrid scarf joints.

Thermo-mechanical de-bonding of composite-titanium single-lap adhesive joints (2017)
Presentation / Conference
Ammasai Sengodan, G. (2017, August). Thermo-mechanical de-bonding of composite-titanium single-lap adhesive joints. Presented at 21st International Conference on Composite Materials, Xi'an, China

The aim of this work is to isolate the constituent adherends of the adhesively bonded single lap joints with minimal or no damage to them and prepare the debonded surfaces for re-bonding. Thermo-mechanical separation of carbon fiber reinforced plasti... Read More about Thermo-mechanical de-bonding of composite-titanium single-lap adhesive joints.

Experimental and numerical investigation of process-induced deformations of glass/epoxy wind turbine blade spar cap (2017)
Journal Article
Ammasai Sengodan, G., Joshi, S., & Chen, Z. (2017). Experimental and numerical investigation of process-induced deformations of glass/epoxy wind turbine blade spar cap. Journal of Composite Materials, 51(27), https://doi.org/10.1177/0021998317693909

A scaled, 7.5-mm thick, unidirectional glass/epoxy wind turbine spar cap cured in a vacuum-assisted oven was found to have attained non-uniform thickness along its length. Edge deformations were severe, leading to noticeable edge curvature even at th... Read More about Experimental and numerical investigation of process-induced deformations of glass/epoxy wind turbine blade spar cap.

Experimental and numerical investigation of process-induced deformations of a wind turbine blade composite spar cap (2017)
Journal Article
Ammasai Sengodan, G., Joshi, S., & Chen, Z. (2017). Experimental and numerical investigation of process-induced deformations of a wind turbine blade composite spar cap. Journal of Composite Materials, 51(27), https://doi.org/10.1177/0021998317693909

A scaled, 7.5-mm thick, unidirectional glass/epoxy wind turbine spar cap cured in a vacuum-assisted oven was found to have attained non-uniform thickness along its length. Edge deformations were severe, leading to noticeable edge curvature even at th... Read More about Experimental and numerical investigation of process-induced deformations of a wind turbine blade composite spar cap.

In-situ measurement and numerical simulation of resin pressure during Glass/Epoxy prepreg composite manufacturing (2016)
Journal Article
Ammasai Sengodan, G., Maheshwari, M., Joshi, S., Chen, Z., Asundi, A., & Tjin, S. (2016). In-situ measurement and numerical simulation of resin pressure during Glass/Epoxy prepreg composite manufacturing. Measurement, 94, 505-514. https://doi.org/10.1016/j.measurement.2016.08.028

Resin pressure distribution of a curing Glass/Epoxy prepreg lay-up is the key parameter that controls the strength, stiffness and void nucleation of the cured composite part. It is vital to monitor and control the resin movement of curing laminate to... Read More about In-situ measurement and numerical simulation of resin pressure during Glass/Epoxy prepreg composite manufacturing.

Flow-compacted deformations coupled with thermo-chemically induced distortions in manufacturing of thick unidirectional carbon fiber reinforced plastics composites (2016)
Journal Article
Ammasai Sengodan, G., Joshi, S., & Chen, Z. (2016). Flow-compacted deformations coupled with thermo-chemically induced distortions in manufacturing of thick unidirectional carbon fiber reinforced plastics composites. Journal of Composite Materials, 50(24), https://doi.org/10.1177/0021998315618455

A novel technique to predict the manufacturing process-induced distortions and deformations in thick unidirectional carbon fiber reinforced plastics laminates is detailed in this article. An integrated numerical model is developed to account for non-... Read More about Flow-compacted deformations coupled with thermo-chemically induced distortions in manufacturing of thick unidirectional carbon fiber reinforced plastics composites.

Aerogel core CFRP curved sandwich composites with variable cross-section without ply-drop for body protection and rehabilitation (2016)
Presentation / Conference
Ammasai Sengodan, G., & Joshi, S. (2016, May). Aerogel core CFRP curved sandwich composites with variable cross-section without ply-drop for body protection and rehabilitation. Presented at SAMPE Long Beach 2016 Conference and Exhibition, Long Beach, United States

A novel method to design and manufacture aerogel core (patented technology) CFRP sandwich composites with variable geometry and mechanical properties without any ply-drop is envisaged, analyzed and demonstrated. Using this method, such composites can... Read More about Aerogel core CFRP curved sandwich composites with variable cross-section without ply-drop for body protection and rehabilitation.

Influence of cure kinetic, rheological and thermo-mechanical behavior on micro-level curing strain of an epoxy prepreg (2015)
Journal Article
Ammasai Sengodan, G., Joshi, S., & Chen, Z. (2015). Influence of cure kinetic, rheological and thermo-mechanical behavior on micro-level curing strain of an epoxy prepreg. Journal of Thermal Analysis and Calorimetry, 124, 305-316. https://doi.org/10.1007/s10973-015-5090-2

The coupled nature of chemical kinetics, mechanical and rheological behavior of a curing prepreg dictates the dimensional accuracy of a composite laminate. In this work, an integrated study was carried out to understand the influence of thermo-chemo-... Read More about Influence of cure kinetic, rheological and thermo-mechanical behavior on micro-level curing strain of an epoxy prepreg.

Integrated analysis of compaction, edge distortion and residual deformation of wind-turbine thick composite spar-cap (2015)
Presentation / Conference
Ammasai Sengodan, G., Joshi, S., & Chen, Z. (2015, July). Integrated analysis of compaction, edge distortion and residual deformation of wind-turbine thick composite spar-cap. Presented at ICCM International Conferences on Composite Materials, Copenhagen, Denmark

A scaled model of a unidirectional glass/epoxy wind turbine spar cap measuring 7.5 mm thick was cured in a vacuum assisted oven and noticed a non-uniform thickness along its length. Even though, a vacuum pressure of 1 bar applied to the laminate, the... Read More about Integrated analysis of compaction, edge distortion and residual deformation of wind-turbine thick composite spar-cap.

Fibre Bragg grating sensors for in-situ measurement of resin pressure in curing composites (2014)
Presentation / Conference
Ammasai Sengodan, G., Maheshwari, M., Joshi, S., Chen, Z., Asundi, A., & Tjin, S. (2014, November). Fibre Bragg grating sensors for in-situ measurement of resin pressure in curing composites. Presented at International Conference on Experimental Mechanics 2014, Singapore

A fibre optic sensor was developed for in-situ pressure measurement based on the principle of differential pressure in liquids. This sensor system is very simple and consists of fibre Bragg grating (FBG) done on a fibre with core diameter of 9 ┬Ám.... Read More about Fibre Bragg grating sensors for in-situ measurement of resin pressure in curing composites.

Bleeder thickness optimization for controlling resin content in thick laminated composites (2013)
Other
Ammasai Sengodan, G., Joshi, S., & Chen, Z. (2013). Bleeder thickness optimization for controlling resin content in thick laminated composites. Advanced Materials Research

Thick laminated composites are manufactured commonly by vacuum bagging of fiber-resin mix or prepregs on a suitable mould and, subsequently curing the lay-up at high temperature and pressure in an either autoclave or oven. At these pressures and temp... Read More about Bleeder thickness optimization for controlling resin content in thick laminated composites.

Simulation of bleeder flow and curing of thick composites with pressure and temperature dependent properties (2013)
Journal Article
Ammasai Sengodan, G., Joshi, S., & Chen, Z. (2013). Simulation of bleeder flow and curing of thick composites with pressure and temperature dependent properties. Simulation Modelling Practice and Theory, 32, 64-82. https://doi.org/10.1016/j.simpat.2012.12.002

A two-dimensional transient heat transfer, one-dimensional compaction and two-dimensional resin flow analysis of a thick laminated composites fabrication assembly including the bleeders and vacuum bagging is carried out in a fully coupled manner. Res... Read More about Simulation of bleeder flow and curing of thick composites with pressure and temperature dependent properties.